4 - ENGINE
117
GEAR TRANSMISSION RATIO
1
st
TR = 73/24
1
st
= 33/11
2
nd
= 30/15
3
rd
= 27/18
4
th
= 24/20
5
th
= 27/25
6
th
= 22/23
7. Inspect:
- Gear change shaft (1).
Damage/warping/wear =>
Renew.
- Return spring (gear change shaft) (2).
- Return spring (limiter rod) (3).
Wear/damage =>
Renew.
INSPECTING THE OIL PUMP
Oil pressure (manometer connected to sensor):
4.2 Bars
Pump with 2 rotors:
Oil
suction
rotor
Thickness: 13,5 mm
Oil pumping rotor
Thickness: 8,5 mm
(standard values)
Radial clearance (1) between rotor points: 0.04 mm
Radial clearance (2) between rotor points: 0.08 mm
Axial clearance (3) between Rotor 1 and pump body: 0.04 mm
Axial clearance (3) between Rotor 2 and pump body: 0.05 mm
Cracking/damage => Renew.
N.B.
Summary of Contents for GPR 125 Racing
Page 1: ...WORKSHOP MANUAL GPR 125 4 stroke ...
Page 169: ...6 COOLING SYSTEM 169 6 1 DIAGRAM OF THE SYSTEM ...
Page 170: ...6 COOLING SYSTEM 170 ...
Page 179: ...7 LUBRICATION SYSTEM 179 7 1 DIAGRAM OF THE SYSTEM ...
Page 180: ...7 LUBRICATION SYSTEM 180 ...
Page 192: ...8 CHASSIS 192 FITTING FRONT SUSPENSION ...
Page 202: ...9 BRAKING SYSTEM 202 9 BRAKING SYSTEM FRONT BRAKE REAR BRAKE 203 211 9 1 9 2 ...
Page 247: ...Rev 0 2009 ...